Hamid Hassan Flashcards
The salivary glands are exocrine merocrine glands, define exocrine and merocrine
Exocrine: secrete products through ducts opening onto epithelium
Merocrine: no part of cell lost during secretion by using vesicles and exocytosis
What type of fibres stimulate salivary secretion
Parasympathetic reflexes
Sympathetic stimulation
What is the acini
Secretory unit producing saliva
What is the pathway of the salivary gland and cell types throughout
Acinar cells cluster around lumen
Lumen empties into intercalated duct lined with simple cuboidal epithelium
Empties into striated duct of simple columnar
Empties into excretory duct of stratified cuboidal
Empties into collecting duct of stratified cuboidal
What is the difference in staining of serous and mucous acinar
Serious have basophilic secretory vesicles around lumen and are acidic so stain purple with HandE
Mucous stain paler with h and e
What are myoepithelial cells
Epithelial cells with muscular features that lie between basal lamina and basal membrane of acinar cells and intercalated duct
What do myoepithelial cells do
4
Reduce back flow of saliva
Accelerate outflow
Reduce luminar volume
Increase secretory pressure
What is a key feature of striated duct structure
2
Basal surface has foldings with mitochondria for energy to aid active transport
Luminar surface has microvilli to increase SA
What occurs in striated duct to make saliva hypotonic
Reabsorbtion of Na and Cl
Secretion of k and HCO3
How is the parotid gland divided
What is it’s duct called
Where does it’s duct empty
Deep part and superficial part divided by facial nerve
Stensons
Upper 2nd molar
What is blood supply to parotid gland
External carotid artery
What is the venous drainage of the parotid gland
External jugular vein
What structure is superior to parotid gland
TMJ
What structure is posterior to parotid gland
Mastoid process
What structure is anterior to parotid gland
Angle of mandible
Medial pterygoid plate
Massater
Stylomandibular ligament
What saliva is produced by submandibular gland
What is it’s duct and where does it drain
Mixed
Wartons
Lingual frenulum
How is the submandibular gland divided
Superficial part below mylohyoid and deep part above mylohyoid
What is the blood supply to submandibular gland
2
Submental artery
Sublingual artery
What is the venous drainage of submandibular gland
Submental vein into facial vein into internal jugular vein
What saliva is secreted by sublingual gland
What is it’s duct called and where does it empty
Mucous saliva
Bartholins
Several openings in floor of mouth
What is the blood supply of sublingual gland
2
Submental artery
Sublingual artery
What is the venous drainage of sublingual gland
Submental vein into facial vein into internal jugular vein
What is the most common type of minor salivary glands
Why is saliva from minor salivary duct high in sodium
Mucous
No intercalated or striated duct
Where are glands of Von ebner
What type of saliva do they produce
Circumvallate papillae
Serous